re PR tree-optimization/59355 (ICE: SIGSEGV in hash_table::find_slot_with_hash() with -fno-devirtualize)

	PR tree-optimization/59355
	* ipa-devirt.c (gate_ipa_devirt): Return false if
	!flag_devirtualize.
	* opts.c (common_handle_option): Fix comment spelling.

	* g++.dg/ipa/pr59355.C: New test.

From-SVN: r205656